check hard disk rpm or rotation speed

Mon, 23 Sep 2019 01:00:50 +0000

Lot of times you want to check the disk rpm, especially on the servers to check if it is 7.2K or 10K or 15K rpm disk. How do you do this from linux terminal. Here it is :

sginfo -g /dev/<device>

Note that sginfo comes from sg3-utils.

Are you swapped? Increase the performance of Linux machine.

Wed, 14 Jul 2010 01:06:31 +0000

With the ever increasing cost of the Hardware, the amount of physical RAM available on the system is increasing day by day. For example, couple of years back, I had a system which was very high end Desktop with 256MB RAM and today I have a 2GB RAM Desktop. So, whats the point.

The Linux systems (right word should be kernel) are desiged to use both RAM and swap partition. Swap partition is a partition on Hard disk and is used mostly like RAM. Problem is that HDD access is always slower than RAM access and hence inherently, the system will work little slower even if you have enough RAM not to use swap. The term ”swappiness” is used to determine how the kernel should try to seam-balance between the use of RAM and swap. By default, most of the distro’s have a swappiness of 60. A higher value of swappiness means that the RAM will be swapped out faster.

Hard Disk on Amit Agarwal Linux Blog

check hard disk rpm or rotation speed

Are you swapped? Increase the performance of Linux machine.